Results 11 to 20 of about 904 (36)

Semidefinite bounds for nonbinary codes based on quadruples. [PDF]

Des Codes Cryptogr, 2017
For nonnegative integers $q,n,d$, let $A_q(n,d)$ denote the maximum cardinality of a code of length $n$ over an alphabet $[q]$ with $q$ letters and with minimum distance at least $d$. We consider the following upper bound on $A_q(n,d)$. For any $k$, let $
Litjens B, Polak S, Schrijver A.
europepmc   +7 more sources

Stroke risk estimation across nine European countries in the MORGAM project. [PDF]

, 2010
Previous tools for stroke risk assessment have either been developed for specific populations or lack data on non-fatal events or uniform data collection.
A. Borglykke, A. H. Andreasen, D. Vanuzzo, H. Tunstall-Pedoe, J. Karvanen, K. Kuulasmaa, L. Palmieri, M. M. Ferrario, M. O. R. G. A. M. Project, P. Ducimeti\ue8re, S. Sans, T. J\uf8rgensen   +11 more
core   +3 more sources

Jucys-Murphy elements and Weingarten matrices [PDF]

, 2010
We provide a compact proof of the recent formula of Collins and Matsumoto for the Weingarten matrix of the orthogonal group using Jucys-Murphy elements.Comment: v2: added a ...
Zinn-Justin, P.
core   +1 more source

Some Combinatorial Properties of Hook Lengths, Contents, and Parts of Partitions [PDF]

, 2009
This paper proves a generalization of a conjecture of Guoniu Han, inspired originally by an identity of Nekrasov and Okounkov. The main result states that certain sums over partitions p of n, involving symmetric functions of the squares of the hook ...
A. Lascoux, G. Andrews, J.S. Frame, N.A. Nekrasov, P.J. Hanlon, R. Stanley, Richard P. Stanley, S. Fujii   +7 more
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Shifted genus expanded $\cal{W}_{\infty}$ algebra and shifted Hurwtiz numbers

, 2016
We construct the shifted genus expanded $\cal{W}_{\infty}$ algebra, which is isomorphic to the central subalgebra $\cal{A}_{\infty}$ of infinite symmetric group algebra and to the shifted Schur symmetrical function algebra $\Lambda^\ast$ defined by A. Y.
Zheng, Quan
core   +1 more source

Mutation graph of support $\tau $ -tilting modules over a skew-gentle algebra

Forum of Mathematics, Sigma
Let $\mathcal {D}$ be a Hom-finite, Krull-Schmidt, 2-Calabi-Yau triangulated category with a rigid object R. Let $\Lambda =\operatorname {End}_{\mathcal {D}}R$ be the endomorphism algebra of R. We introduce the notion of mutation of maximal
Ping He, Yu Zhou, Bin Zhu
doaj   +1 more source

An update on Haiman’s conjectures

Forum of Mathematics, Sigma
We revisit Haiman’s conjecture on the relations between characters of Kazdhan–Lusztig basis elements of the Hecke algebra over $S_n$ . The conjecture asserts that, for purposes of character evaluation, any Kazhdan–Lusztig basis element is reducible
Alex Corrêa Abreu, Antonio Nigro
doaj   +1 more source

Orthogonal roots, Macdonald representations, and quasiparabolic sets

Forum of Mathematics, Sigma
Let W be a simply laced Weyl group of finite type and rank n. If W has type $E_7$ , $E_8$ or $D_n$ for n even, then the root system of W has subsystems of type $nA_1$ .
R. M. Green, Tianyuan Xu
doaj   +1 more source

Unimodular valuations beyond Ehrhart

Forum of Mathematics, Sigma
A complete classification of unimodular valuations on the set of lattice polygons with values in the spaces of polynomials and formal power series, respectively, is established.
Ansgar Freyer, Monika Ludwig, Martin Rubey   +2 more
doaj   +1 more source

A Direct Way to Find the Right Key of a Semistandard Young Tableau [PDF]

, 2011
The right and left key of a semistandard Young tableau were introduced by Lascoux and Schutzenberger in 1990. Most prominently, the right key is a tool used to find Demazure characters for sl(n,C).
Willis, Matthew J.
core